Now, we know that R ∝ l And, R ∝ 1/A Combining the above two, we get R ∝ l/A R = constant x (l/A) R = ρ (l/A) This constant is called … Resistance is with the help of the electrons (the value distributors) in the cord to be obstructed of their bypass via vibrations of atoms in the cord. Thus when temperature goes up, resistance goes up. c. The resistance of the wire is not effected by temperature. Highly conductive materials, such as copper and silver, are used to manufacture wire to achieve a low resistance. Resistance was defined according to the relationship below: I V R= For a manufactured resistor, you discovered that R was constant over the entire range of voltage and current values for which you collected data (i.e., the slope of your V vs. I have done a preliminary experiment to help me decide the best way to do my investigation. Length of wire Diameter or thickness of wire Temperature at which wire is kept The material of which wire is made out of. Anything becomes more stable with cold temp. (3) Material: the material the wire is made out of will affect the resistance. R 1 is the resistance at temperature T 1, and R 2 is the resistance at temperature T. Temperature: Working in different temperatures can: The temperature will be kept at : affect the resistance of the wire because: room temperature, which can : the higher the temperature, the higher: be done by simply doing the : the resistance of the wire since it causes: experiment in one room, within : the electrons will move faster due to an : the same period of time. The other variables included in this experiment are temperature, thickness of wire and density of wire. Resistance is like a constriction in the flow and it's the pressure has to work against. All materials have some resistance, but certain materials resist the flow of electric current more or less than other materials do. If the temperature where resistor is placed is more or less than 20 degree Celsius, then the value of that specified resistor differs. Hence these materials are used in wire bound standard resistors as the variation in the value of resistance is negligible when the temperature changes. Temperature has little effect on the resistance of some alloys, such as constantan.For a few materials, including carbon and other semiconductors, the resistance decreases as the temperature increases.. To ensure accuracy, I have taken three readings each of … Manganin : Constantan: Factors affecting resistivity. Reply. Below are my results from the preliminary experiment (see Table 1). Preliminary Investigation. Cold decreases the resistance. Switch on again. Coursework Aim To find out how the length of a wire can affect resistance. The equation representing the dependency of the resistance (R) of a cylindrically shaped conductor (e.g., a wire) upon the variables that affect it is where L represents the length of the wire (in meters), A represents the cross-sectional area of the wire (in meters 2 … The potential difference or voltage. The three factors that affect resistance are: length, cross-sectional area, and resistivity. Resistance is due to the electrons (the charge carriers) in the wire to be obstructed in their flow by vibrations of atoms in the wire. As the temperature of the material increases, the ions of the material vibrate more and this increases the number of collisions as electrons move through the wire. This first in a series of videos will show you by means of a practical experiment how changing temperature affects the resistance of a conductor. But in case of alloys (like nichrome), Temperature has no effect on the resistance. The wire resistance will go up 0.00255 ohms (10 degrees * 0.00393 per degree * 0.0649 ohms = 0.00255 ohms). At higher temperatures, resistance of the wire is greater. Damaged power line cables have higher chances of snapping during low temperature conditions. Humidity Cross sectional area. The resistance of a wire depends on 3 parameters: the conductivity of the material from which the wire is made, its cross sectional area, and its length. ρ = ρ 0 (1 + α(T − T 0)) The resistivity of a conductor increases with temperature. How Does The Legnth Of A Wire Affect Resistance In A Circuit? Different materials have different resistivities, which is the ability of the material to allow electrons to move. Highly conductive materials like silver and copper offer the least amount of resistance to the flow of electrons compared to a highly resistant material like rubber. The material make up of a wire affects its resistance. Method. 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